Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf557ba0fc70b65e…

MALICIOUS

PDF

74.7 KB Created: 2021-03-31 18:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ffe8310aebe499b2032d6131de290426 SHA-1: cf12a667b5e53a364b43c23b5f11fc3db17efc54 SHA-256: cf557ba0fc70b65e5755be57f19ada94d047c04a72a681913d4e3f49c825166d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a malicious payload or phishing content. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wix?keyword=liberty+riders+mc PDF link annotation
    • https://cdn.sqhk.co/gotakavapu/kzlieeo/64500015136.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/hiyibid/80497196365.pdfIn PDF document text
    • https://cdn.sqhk.co/fujesepulo/hd1aDlR/aips_ka_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/iFjgthc/turukigujapitorosaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_601be0f4114cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_603b169a9935e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379974/normal_5fc80efe2f85b.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/ijRShc7/calendar_day_calculator_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_600bb4f3378ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458389/normal_5fe3ac94df1c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ninasivol/buy_honda_lawn_mower_parts_online.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/vewulonosakat.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/fafusewivijababo.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/jolly_phonics_set_3_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/anti_mosquito_sound_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2d8ca9-7214-4aea-9087-8f39236006f9/wuferotot.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/nemozat.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/gipiditu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2801eee-c2e3-4369-8214-acfb420f99c5/acorn_stairlift_superglide_120_parts.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE677 5024 bytes
SHA-256: d872ea5ac69eb147bd019485eca2c461d8c2cf14fbd5e98da061759b3bc57f2e
font_01_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 10696 bytes
SHA-256: 169aea958bb041348139251112a190a7e55d2eafd9679a3384f72182b09eecdf

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